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/*
Copyright (C) 2014 Tim Mayberry
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libpbd_timer_h__
#define __libpbd_timer_h__
#include <sigc++/signal.h>
#include <glibmm/main.h>
#include "pbd/libpbd_visibility.h"
namespace PBD {
/**
* The Timer class is a wrapper around Glib TimeoutSources
* The Timer will start automatically when the first connection
* is made and stop when the last callback is disconnected.
*/
class LIBPBD_API Timer
{
public:
Timer (unsigned int interval,
const Glib::RefPtr<Glib::MainContext>& main_context);
unsigned int get_interval () const;
void set_interval (unsigned int new_interval);
virtual unsigned int connection_count () const = 0;
void suspend () { m_suspended = true; }
void resume () { m_suspended = false; }
protected:
virtual ~Timer() { }
void start ();
void stop ();
virtual bool on_elapsed () = 0;
bool suspended () const { return m_suspended; }
private:
Timer(const Timer&);
Timer& operator= (const Timer&);
private:
static gboolean _timeout_handler (void *data);
bool timeout_handler ();
GSource* m_timeout_source;
unsigned int m_timeout_interval;
const Glib::RefPtr<Glib::MainContext> m_main_context;
bool m_suspended;
};
class LIBPBD_API StandardTimer : public Timer
{
public:
StandardTimer (unsigned int interval,
const Glib::RefPtr<Glib::MainContext>& main_context = Glib::MainContext::get_default());
sigc::connection connect (const sigc::slot<void>& slot);
virtual unsigned int connection_count () const
{ return m_signal.size (); }
protected:
virtual bool on_elapsed ();
sigc::signal<void> m_signal;
};
class LIBPBD_API BlinkTimer : public Timer
{
public:
BlinkTimer (unsigned int interval,
const Glib::RefPtr<Glib::MainContext>& main_context = Glib::MainContext::get_default());
sigc::connection connect (const sigc::slot<void, bool>& slot);
virtual unsigned int connection_count () const
{ return m_blink_signal.size (); }
protected:
virtual bool on_elapsed ();
sigc::signal<void, bool> m_blink_signal;
};
} // namespace PBD
#endif // __libpbd_timer_h__
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